On Tuesday, May 14, 2013 10:46:45 you wrote:
> Hi Expert
>
> I have a question on using MELODIC. My dataset is 128*128*7*600. There are
> 7 slices in this dataset. Can I extract only 3 slices (128*128*3*600) to
> process in MELODIC?
Sure, if you would like. Just make certain they are the same three Z-coordinates for every subject.
> I found that there is a parameter TR at the GUI of
> MELODIC. Can anyone tell me what is the function of this parameter (TR) in
> MELODIC. It would be not right (if I extract only 3 slices) if TR is very
> impartant in MELODIC.
TR is the repetition time of your acquisition, i.e., how often do you acquire each of your 600 volumes? For example, if I acquire a volume every 3 seconds then my TR is 3. TR is (to my limited knowledge) not used by the ICA algorithm itself, however it is important for pre-processing steps like lowpass filtering.
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